阅读说明：本技术 一种洗车机及其刷具监控方法 (Car washer and brush monitoring method thereof ) 是由 范春林 高志军 陈弘昌 于 2021-09-26 设计创作，主要内容包括：本发明公开了一种洗车机及其刷具监控方法,洗车机包括控制器、刷具、碰撞感应装置、接近传感器、滑块、滑轨、支架,滑轨固定在支架上,刷具通过滑块滑动安装于滑轨上,接近传感器设置在连接件的下方,用于响应滑块的触发向控制器发送离开信号；碰撞感应装置包括活塞缸、磁性传感器以及磁体,活塞缸包括缸体以及滑动设置在缸体内腔中的活塞杆,磁性传感器设于缸体上,用于响应磁体的触发向控制器发送碰撞信号,磁体与活塞杆连接,能够被活塞杆带动运动以远离或接近磁性传感器；车辆撞向刷具进行清洗,控制器通过接收到的碰撞信号和离开信号,根据设定的时间阈值分析洗车机刷具的碰撞持续时间,从而发现洗车机刷具的异常情况。(The invention discloses a car washer and a brush monitoring method thereof, wherein the car washer comprises a controller, a brush, a collision sensing device, a proximity sensor, a sliding block, a sliding rail and a bracket, wherein the sliding rail is fixed on the bracket; the collision sensing device comprises a piston cylinder, a magnetic sensor and a magnet, the piston cylinder comprises a cylinder body and a piston rod which is arranged in an inner cavity of the cylinder body in a sliding manner, the magnetic sensor is arranged on the cylinder body and used for responding to the triggering of the magnet and sending a collision signal to the controller, and the magnet is connected with the piston rod and can be driven by the piston rod to move to be far away from or close to the magnetic sensor; the controller analyzes the collision duration time of the brush of the car washer according to the set time threshold value through the received collision signal and the leaving signal, so as to find the abnormal condition of the brush of the car washer.)

1. A monitoring method of a brush of a car washer is applied to the car washer and is characterized by comprising the following steps:

when the controller receives a collision signal sent by the collision sensing device, the time of receiving the collision signal is used as an initial time node of the collision duration; wherein the collision signal is used for indicating that the brush is impacted by the vehicle;

when the collision duration time exceeds a set time threshold and the controller does not receive a leaving signal sent by the proximity sensor, the controller sends a first alarm instruction to the alarm terminal; the first alarm instruction is used for indicating the alarm terminal to send out an alarm signal, and the leaving signal is used for indicating that the brush leaves the detection range of the proximity sensor.

2. The method as claimed in claim 1, wherein the brush comprises a brush roll, the collision sensor is a pressure sensor disposed on the brush roll, and the proximity sensor is a light correlation sensor.

3. A car washer is characterized by comprising a controller, a brush, a collision sensing device, a proximity sensor, a sliding block, a sliding rail and a bracket, wherein the sliding rail is fixed on the bracket; the collision sensing device comprises a piston cylinder, a magnetic sensor and a magnet, the piston cylinder comprises a cylinder body and a piston rod which is arranged in an inner cavity of the cylinder body in a sliding manner, the magnetic sensor is arranged on the cylinder body and used for responding to the triggering of the magnet and sending a collision signal to the controller, the magnet is connected with the piston rod and can be driven by the piston rod to move to be far away from or close to the magnetic sensor, one end of the cylinder body is connected with the sliding block, and one end of the piston rod is connected with the brush;

the controller is configured to:

when receiving a collision signal, taking the time of receiving the collision signal as a starting time node of collision duration; wherein the collision signal is used for indicating that the brush is impacted by the vehicle;

when the collision duration time exceeds a set time threshold and a leaving signal sent by a proximity sensor is not received, sending a first alarm instruction to an alarm terminal; the first alarm instruction is used for indicating the alarm terminal to send out an alarm signal, and the leaving signal is used for indicating that the brush leaves the detection range of the proximity sensor.

4. The car washer of claim 3, wherein the controller is further configured to:

when a departure signal sent by a proximity sensor is received, taking the time of receiving the departure signal as an end time node of the collision duration;

and determining an abnormal value of the collision duration according to the termination time node and the start time node.

5. A car washer according to claim 3, characterized in that the set time threshold is in the range of 0.5 to 1 second.

6. The car washer of claim 3, wherein the proximity sensor is an eddy current type proximity switch and the slider is made of metal.

7. A method for monitoring brushes of a car washer is applied to the car washer and is characterized in that the car washer comprises a controller, the brushes, a collision sensing device, a proximity sensor, a sliding block, a sliding rail and a bracket, wherein the sliding rail is fixed on the bracket; the collision sensing device comprises a piston cylinder, a magnetic sensor and a magnet, the piston cylinder comprises a cylinder body and a piston rod which is arranged in an inner cavity of the cylinder body in a sliding manner, the magnetic sensor is arranged on the cylinder body and used for responding to the triggering of the magnet and sending a collision signal to the controller, the magnet is connected with the piston rod and can be driven by the piston rod to move to be far away from or close to the magnetic sensor, one end of the cylinder body is connected with the sliding block, and one end of the piston rod is connected with the brush;

the method comprises the following steps:

when the controller receives the collision signal, taking the time of receiving the collision signal as a starting time node of the collision duration; wherein the collision signal is used for indicating that the brush is impacted by the vehicle;

when the collision duration time exceeds a set time threshold and a leaving signal sent by a proximity sensor is not received, a controller sends a first alarm instruction to an alarm terminal; the first alarm instruction is used for indicating the alarm terminal to send out an alarm signal, and the leaving signal is used for indicating that the brush leaves the detection range of the proximity sensor.

8. The method for monitoring brushes of a car washer as claimed in claim 7, wherein said method further comprises:

when the controller receives a leaving signal sent by the proximity sensor, the time of receiving the leaving signal is used as a termination time node of the collision duration;

the controller determines an abnormal value of the collision duration based on the end time node and the start time node.

9. The method as claimed in claim 7, wherein the threshold time is in the range of 0.5 to 1 second.

10. The method as claimed in claim 7, wherein the proximity sensor is an eddy current type proximity switch and the slider is made of metal.

Technical Field

The invention relates to the technical field of car washing monitoring, in particular to a car washer and a brush monitoring method thereof.

Background

In the existing tunnel type car washer, the vehicles are automatically conveyed to each car washing area through a conveying platform to be washed, and then the vehicles are conveyed out of the car washer. However, during automatic car washing, an abnormal situation may occur.

In the related art, the car washer cleans the car through the brush in the following steps: the chain plate drags the vehicle to be conveyed forwards in the car washer, the vehicle can be in contact collision with the brush in the conveying process, and the brush is driven by the motor to rotate after being in contact collision with the vehicle so as to clean the surface of the vehicle. After the brush finishes cleaning within a set time, an avoiding function can be realized, so that the brush leaves from a path where the vehicle travels, and the brush is prevented from being damaged by collision of the vehicle. For example, the brush may be moved out of the path of travel of the vehicle by mechanical means, or the brush may be pushed by the vehicle so as to be out of the path of travel of the vehicle.

In the related art, if the avoidance function of the brush is abnormal, the brush is damaged by vehicle collision, and even further safety accidents are caused.

Disclosure of Invention

The invention aims to provide a car washer and a monitoring method of a brush of the car washer, which can find the abnormality of the avoiding function of the brush in time and send out an alarm to avoid the brush from being damaged by collision of a vehicle.

In order to achieve the purpose of the invention, the following technical scheme is provided:

in a first aspect, the present invention provides a method for monitoring a brush of a car washer, which is applied to the car washer, and the method includes:

when the controller receives a collision signal sent by the collision sensing device, the time of receiving the collision signal is used as an initial time node of the collision duration; wherein the collision signal is used for indicating that the brush is impacted by the vehicle;

when the collision duration time exceeds a set time threshold and the controller does not receive a leaving signal sent by the proximity sensor, the controller sends a first alarm instruction to the alarm terminal; the first alarm instruction is used for indicating the alarm terminal to send out an alarm signal, and the leaving signal is used for indicating that the brush leaves the detection range of the proximity sensor.

Compared with the prior art, the invention has the following beneficial effects: the collision sensing device can detect whether the brush is collided by a vehicle or not, the proximity sensor can judge whether the brush avoids the vehicle or not (namely whether the brush leaves the detection range of the proximity sensor or not), further, the collision sensing device determines the starting time node of the collision duration after the brush is collided by the vehicle, determines whether the avoiding function of the brush is abnormal or not by judging whether the collision duration exceeds the set time threshold or not, further sends a first alarm instruction to the alarm terminal in time, reminds an operator to deal with the abnormality in time through the alarm terminal, and avoids the brush from being damaged by the vehicle collision.

Further, the brush comprises a brush roller, the collision sensing device is a pressure sensor arranged on the brush roller, and the proximity sensor is a light correlation sensor.

In a second aspect, the invention provides a car washer, which comprises a controller, a brush, a collision sensing device, a proximity sensor, a sliding block, a sliding rail and a bracket, wherein the sliding rail is fixed on the bracket; the collision sensing device comprises a piston cylinder, a magnetic sensor and a magnet, the piston cylinder comprises a cylinder body and a piston rod which is arranged in an inner cavity of the cylinder body in a sliding manner, the magnetic sensor is arranged on the cylinder body and used for responding to the triggering of the magnet and sending a collision signal to the controller, the magnet is connected with the piston rod and can be driven by the piston rod to move to be far away from or close to the magnetic sensor, one end of the cylinder body is connected with the sliding block, and one end of the piston rod is connected with the brush;

the controller is configured to:

when receiving a collision signal, taking the time of receiving the collision signal as a starting time node of collision duration; wherein the collision signal is used for indicating that the brush is impacted by the vehicle;

when the collision duration time exceeds a set time threshold and a leaving signal sent by a proximity sensor is not received, sending a first alarm instruction to an alarm terminal; the first alarm instruction is used for indicating the alarm terminal to send out an alarm signal, and the leaving signal is used for indicating that the brush leaves the detection range of the proximity sensor.

Compared with the prior art, the invention has the following beneficial effects: the collision sensing device can detect whether the brush is collided by a vehicle or not, the proximity sensor can judge whether the brush avoids the vehicle or not (namely whether the brush leaves the detection range of the proximity sensor or not), further, the collision sensing device determines the starting time node of the collision duration after the brush is collided by the vehicle, and determines whether the avoiding function of the brush is abnormal or not by judging whether the collision duration exceeds the set time threshold, so that a first alarm instruction is sent to the alarm terminal in time, an operator is reminded to deal with the abnormality in time through the alarm terminal, and the brush is prevented from being damaged by the vehicle collision.

Further, the controller is further configured to:

when a departure signal sent by a proximity sensor is received, taking the time of receiving the departure signal as an end time node of the collision duration;

and determining an abnormal value of the collision duration according to the termination time node and the start time node.

When the avoidance function of the brush tool is abnormal, the abnormal value of the collision duration can be automatically acquired, and the subsequent abnormal condition can be conveniently analyzed.

Further, the set time threshold ranges from 0.5 to 1 second.

Furthermore, the proximity sensor is an eddy current type proximity switch, and the sliding block is made of metal.

Further, the proximity sensor is a light correlation sensor.

The invention provides a method for monitoring a brush of a car washer, which is applied to the car washer and comprises a controller, the brush, a collision sensing device, a proximity sensor, a sliding block, a sliding rail and a bracket, wherein the sliding rail is fixed on the bracket, the brush is slidably mounted on the sliding rail through the sliding block, and the proximity sensor is arranged below a connecting piece and used for responding to the triggering of the sliding block and sending a leaving signal to the controller; the collision sensing device comprises a piston cylinder, a magnetic sensor and a magnet, the piston cylinder comprises a cylinder body and a piston rod which is arranged in an inner cavity of the cylinder body in a sliding manner, the magnetic sensor is arranged on the cylinder body and used for responding to the triggering of the magnet and sending a collision signal to the controller, the magnet is connected with the piston rod and can be driven by the piston rod to move to be far away from or close to the magnetic sensor, one end of the cylinder body is connected with the sliding block, and one end of the piston rod is connected with the brush;

the method comprises the following steps:

when the controller receives the collision signal, taking the time of receiving the collision signal as a starting time node of the collision duration; wherein the collision signal is used for indicating that the brush is impacted by the vehicle;

when the collision duration time exceeds a set time threshold and a leaving signal sent by a proximity sensor is not received, a controller sends a first alarm instruction to an alarm terminal; the first alarm instruction is used for indicating the alarm terminal to send out an alarm signal, and the leaving signal is used for indicating that the brush leaves the detection range of the proximity sensor.

Compared with the prior art, the invention has the following beneficial effects: the collision sensing device can detect whether the brush is collided by a vehicle or not, the proximity sensor can judge whether the brush avoids the vehicle or not (namely whether the brush leaves the detection range of the proximity sensor or not), further, the collision sensing device determines the starting time node of the collision duration after the brush is collided by the vehicle, and determines whether the avoiding function of the brush is abnormal or not by judging whether the collision duration exceeds the set time threshold, so that a first alarm instruction is sent to the alarm terminal in time, an operator is reminded to deal with the abnormality in time through the alarm terminal, and the brush is prevented from being damaged by the vehicle collision.

Further, the method further comprises:

when the controller receives a leaving signal sent by the proximity sensor, the time of receiving the leaving signal is used as a termination time node of the collision duration;

the controller determines an abnormal value of the collision duration based on the end time node and the start time node.

When the avoidance function of the brush tool is abnormal, the abnormal value of the collision duration can be automatically acquired, and the subsequent abnormal condition can be conveniently analyzed.

Further, the set time threshold ranges from 0.5 to 1 second.

Furthermore, the proximity sensor is an eddy current type proximity switch, and the sliding block is made of metal.

Further, the proximity sensor is a light correlation sensor.

Drawings

The invention is further described below with reference to the accompanying drawings;

FIG. 1 is a schematic view of the overall structure of a car washer according to an embodiment of the present invention;

FIG. 2 is a schematic view of a car washer platform according to an embodiment of the present invention;

FIG. 3 is a schematic view of a collision sensing apparatus according to an embodiment of the present invention;

FIG. 4 is a flowchart of a method for monitoring brushes of a car washer according to an embodiment of the present invention;

wherein, 100, the brush tool; 200. a collision sensing device; 210. a piston cylinder; 211. a cylinder body; 212. a piston rod; 220. a magnetic sensor; 230. a magnet; 300. a connecting member; 400. a slider; 500. a slide rail; 600. a support; 700. a cross member.

Detailed Description

The invention is further described with reference to the following figures and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As described in the background, most car washers ignore monitoring for abnormal car washing, and thus cannot handle abnormal situations in time.

To facilitate understanding of the invention by those skilled in the art, a brief description of terms related to embodiments of the invention follows:

(1) a controller: which is referred to herein as a programmable logic controller, controls various types of machinery or manufacturing processes via digital or analog inputs and outputs.

(2) Magnetic sensor: a sensor using a magnetic material as a sensitive element, the magnetic material having a magnetic property which changes upon receiving external heat, light, pressure, radiation, or the like.

(3) Vortex proximity switch: when the conductive object is close to the proximity switch, which can generate an electromagnetic field, eddy current is generated in the object, and the eddy current reacts on the proximity switch to change the circuit parameters in the switch, so that whether the conductive object is close to the proximity switch is identified, and the on-off of the switch is controlled.

In the existing tunnel type car washer, the vehicles are automatically conveyed to each car washing area through a conveying platform to be washed, and then the vehicles are conveyed out of the car washer. The car washer cleans the car through the brush 100, and the brush 100 can perform an avoidance function on the car after cleaning the car, so that the car can be continuously conveyed forwards. When the avoidance function of the brush 100 is abnormal, the brush 100 is damaged by vehicle collision, and even further safety accidents are caused.

In order to solve the problems in the prior art, the invention provides a car washer and a monitoring method of a brush 100 of the car washer, which can find the abnormality of the avoidance function of the brush 100 in time and send an alarm to avoid the brush 100 from being damaged by collision of a vehicle.

In one embodiment, a method for monitoring a brush 100 of a car washer is provided, which is applied to the car washer;

as shown in fig. 1, the car washer includes a controller, a brush 100, a collision sensing device 200, a proximity sensor, a connector 300, a slider 400, a slide rail 500, a bracket 600, and a beam 700, wherein the slide rail 500 is fixed to the bracket 600, the bracket 600 is connected to the beam 700 through the connector 300, the brush 100 is slidably mounted on the slide rail 500 through the slider 400, the proximity sensor is disposed below the connector 300 and is configured to send a leaving signal to the controller in response to the trigger of the slider 400, and the proximity sensor is capable of determining whether the brush 100 has left the vehicle (i.e., whether the brush 100 has left the range detected by the proximity sensor).

In one embodiment, the proximity sensor is an eddy current type proximity switch and the slider 400 is made of metal. Specifically, as shown in fig. 2, when a vehicle moves forward from right to left on the car washer platform and impacts the brush 100, the brush 100 moves on the slide rail 500 through the slider 400, the slider 400 is driven to approach the proximity sensor, the proximity sensor recognizes the approach of the slider 400, the brush 100 cleans the vehicle, and after the cleaning for a set time is completed, the brush 100 avoids the vehicle and the vehicle continues to move forward.

In one embodiment, the brush 100 includes a brush roll and a brush cloth or bristles wrapped around the brush roll, the collision sensing device 200 is a pressure sensor disposed on the brush roll, and the proximity sensor is a light correlation sensor. The collision sensing device 200 senses the collision of the vehicle, and after the brush cloth or bristles of the brush 100 clean the vehicle, the brush 100 moves along the slide rail 500 through the slide block 400 to avoid the vehicle, so as to avoid being damaged by the collision of the vehicle.

As shown in fig. 3, the collision sensing device 200 includes a piston cylinder 210, a magnetic sensor 220 and a magnet 230, the piston cylinder 210 includes a cylinder body 211 and a piston rod 212 slidably disposed in an inner cavity of the cylinder body 211, the magnetic sensor 220 is disposed on the cylinder body 211 and is configured to send a collision signal to the controller in response to the activation of the magnet 230, the magnet 230 is connected to the piston rod 212 and can be moved by the piston rod 212 to move away from or approach the magnetic sensor 220, one end of the cylinder body 211 is connected to the slider 400, one end of the piston rod 212 is connected to the brush 100, and the collision sensing device 200 can detect whether the brush 100 is collided by a vehicle.

Specifically, when a vehicle advancing in the car washer collides with the brush 100, the brush 100 slides on the slide rail 500 through the slider 400, the brush 100 drives the piston rod 212, the piston rod 212 is connected to the magnet 230, the magnet 230 is driven by the piston rod 212 to approach the magnetic sensor 220, and the magnetic sensor 220 responds to the trigger of the magnet 230, so that the collision sensing device 200 sends a collision signal to the controller.

Specifically, when the vehicle continues to advance in the car washer, the brush 100 slides on the slide rail 500 through the slider 400, the brush 100 drives the piston rod 212, the piston rod 212 is connected with the magnet 230, the magnet 230 is driven by the piston rod 212 to be away from the magnetic sensor 220, and the proximity sensor responds to the trigger of the slider 400, so that the proximity sensor sends a leaving signal to the controller.

In one embodiment, the controller is configured to, when receiving the collision signal, take a time at which the collision signal is received as a start time node of the collision duration; wherein the collision signal is used to indicate that the brush 100 is hit by a vehicle; when the collision duration time exceeds a set time threshold and a leaving signal sent by a proximity sensor is not received, sending a first alarm instruction to an alarm terminal; the first alarm instruction is used for instructing the alarm terminal to send an alarm signal, and the departure signal is used for instructing the brush 100 to depart from the detection range of the proximity sensor. When a departure signal sent by a proximity sensor is received, taking the time of receiving the departure signal as an end time node of the collision duration; and determining an abnormal value of the collision duration according to the termination time node and the start time node. When the avoidance function of the brush 100 is abnormal, the abnormal value of the collision duration can be automatically acquired, so that the subsequent abnormal condition can be conveniently analyzed.

The controller sets a time threshold, and the range of the time threshold can be set according to the actual operation condition of the car washer brush 100.

Preferably, the time threshold is set in the range of 0.5 to 1 second.

Specifically, when a vehicle collides with the brush 100, the collision sensing device 200 sends a collision signal to the controller, the controller receives the collision signal as a start time node of the collision time, and the vehicle leaves the brush 100, and the controller receives the leaving signal as an end time node of the collision time. The set time threshold is 0.5 second, when the collision duration time exceeds 0.5 second, the controller sends a first alarm instruction to the alarm terminal, the alarm terminal sends out an alarm signal, the abnormal condition of the brush 100 is timely fed back to an operator, and the operator is reminded of handling in time.

In one embodiment, as shown in fig. 4, a method for monitoring a car washer brush 100 includes:

step S102, when the controller receives the collision signal, the time of receiving the collision signal is used as the starting time node of the collision duration; wherein the collision signal is used to indicate that the brush 100 is hit by a vehicle;

step S104, when the collision duration time exceeds a set time threshold and a leaving signal sent by a proximity sensor is not received, a controller sends a first alarm instruction to an alarm terminal; the first alarm instruction is used for instructing the alarm terminal to send an alarm signal, and the departure signal is used for instructing the brush 100 to depart from the detection range of the proximity sensor.

Step S106, when the controller receives the leaving signal sent by the proximity sensor, the time of receiving the leaving signal is used as a termination time node of the collision duration;

step S108, the controller determines an abnormal value of the collision duration according to the termination time node and the start time node; the time threshold is set in the range of 0.5 to 1 second.

Whether the brush 100 is collided by a vehicle or not can be detected by the collision sensing device 200, whether the brush 100 avoids the vehicle or not can be judged by the proximity sensor (namely whether the brush 100 leaves the detection range of the proximity sensor or not), the starting time node of the collision duration after the brush 100 is collided by the vehicle is determined by the collision sensing device 200, whether the avoiding function of the brush 100 is abnormal or not is determined by judging whether the collision duration exceeds the set time threshold, and then a first alarm instruction is timely sent to the alarm terminal, an operator is reminded to timely handle the abnormality through the alarm terminal, and the brush 100 is prevented from being damaged by the vehicle collision.

From the above description, the above-described embodiments of the present invention achieve the following technical effects:

according to the invention, the time threshold is set by the controller as the normal range of the collision duration, when a vehicle is cleaned in the area of the brush 100, the collision duration of the brush 100 exceeds the set time threshold, the controller can judge that the vehicle encounters an abnormal condition when the vehicle is cleaned in the area of the brush 100, and sends an alarm instruction to the alarm terminal, so that an operator is further reminded to handle the abnormal condition, and the brush 100 is prevented from being damaged.

As shown in fig. 1, 2 and 3, in one embodiment, there is also provided a car washer, including a controller, a brush 100, a collision sensing device 200, a proximity sensor, a connector 300, a slider 400, a slide rail 500, a bracket 600 and a beam 700, wherein the slide rail 500 is fixed on the bracket 600, the brush 100 is slidably mounted on the slide rail 500 through the slider 400, and the proximity sensor is disposed below the connector and used for sending an exit signal to the controller in response to the trigger of the slider 400; the collision sensing device 200 comprises a piston cylinder 210, a magnetic sensor 220 and a magnet 230, the piston cylinder 210 comprises a cylinder body 211 and a piston rod 212 which is arranged in an inner cavity of the cylinder body 211 in a sliding manner, the magnetic sensor 220 is arranged on the cylinder body 211 and used for responding to the triggering of the magnet 230 and sending a collision signal to a controller, the magnet 230 is connected with the piston rod 212 and can be driven by the piston rod 212 to move to be far away from or close to the magnetic sensor 220, one end of the cylinder body 211 is connected with a sliding block 400, and one end of the piston rod 212 is connected with the brush tool 100;

the controller is used for:

when receiving a collision signal, taking the time of receiving the collision signal as a starting time node of collision duration; wherein the collision signal is used to indicate that the brush 100 is hit by a vehicle;

when the collision duration time exceeds a set time threshold and a leaving signal sent by a proximity sensor is not received, sending a first alarm instruction to an alarm terminal; the first alarm instruction is used for instructing the alarm terminal to send out an alarm signal, and the departure signal is used for instructing the brush 100 to depart from the detection range of the proximity sensor.

Further, the controller is further configured to:

when a departure signal sent by a proximity sensor is received, taking the time of receiving the departure signal as an end time node of the collision duration;

and determining an abnormal value of the collision duration according to the termination time node and the start time node.

Further, the time threshold is set in the range of 0.5 to 1 second.

Further, the proximity sensor is an eddy current type proximity switch, and the slider 400 is made of a metal material.

The device embodiment and the method embodiment of the present invention are based on the same inventive concept and are not described herein again.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive changes in the technical solutions of the present invention.